[PATCH v2 02/10] KVM: PPC: Flush/zap all memslots on kvm_arch_flush_shadow_all()

[Sean Christopherson]

Flush/zap every memslot in kvm_arch_flush_shadow_all(), i.e. when the
owning userspace process is exiting, as KVM must ensure all associated
memory is unmapped from the guest.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
 arch/powerpc/include/asm/kvm_host.h |  1 -
 arch/powerpc/kvm/powerpc.c          | 11 +++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 2d139c807577..1c8d9d7360e9 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -903,7 +903,6 @@ struct kvm_vcpu_arch {
 #define __KVM_HAVE_CREATE_DEVICE
 
 static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
-static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
 
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 9194cf492d1c..9e9d0865c2f6 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -764,6 +764,17 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
 	kvmppc_core_commit_memory_region(kvm, old, new, change);
 }
 
+void kvm_arch_flush_shadow_all(struct kvm *kvm)
+{
+	struct kvm_memory_slot *slot;
+	struct kvm_memslots *slots;
+	int bkt;
+
+	slots = kvm_memslots(kvm);
+	kvm_for_each_memslot(slot, bkt, slots)
+		kvmppc_core_flush_memslot(kvm, slot);
+}
+
 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 				   struct kvm_memory_slot *slot)
 {
-- 
2.56.0.rc1.315.gc6ed9934b7-goog